CN105096968B - Disc driver and the method for controlling rewriting data - Google Patents

Abstract

The present invention relates to disc driver and the methods for controlling rewriting data.The controller of the disc driver of embodiments of the present invention, the influence that the data write-in carried out respectively by the magnetic track of the first counter associated with the first magnetic track on disk and the second counter management in the range of the outer adjacent track of first magnetic track and the magnetic track in the range of interior adjacent track brings first magnetic track.First counter and second counter represent that the magnetic track in the range of the outer adjacent track and the magnetic track in the range of the interior adjacent track carry out the number of data write-in respectively.The controller is based on first counter and the respective value of the second counter, reads the data of first magnetic track and rewrites the data read to first magnetic track.

Description

Disc driver and the method for controlling rewriting data

Technical field

Embodiments of the present invention are related to disc driver and the method for controlling rewriting data.

Background technology

In recent years, with disc driver recording capacity raising, promote high track density.Since the high magnetic track is close Degreeization so that interval (namely track pitch) narrowization of the magnetic track on disk (disk).

If track pitch narrowization, when being magnetically written data to goal track from head (magnetic head), may cause It is deteriorated through being magnetically written to the magnetic of the data in the magnetic track adjacent with the goal track.The reason is that caused by head It is in magnetic field, be helpless to goal track data write-in ingredient, so-called stray field.

Here, the stray field of Mr. Yu's magnetic track (hereinafter referred to as magnetic track T) is influenced to write to adjacent track progress data every time It is fashionable all to accumulate.Therefore, with the increase for the number that data write-in is carried out to adjacent track, the magnetization of magnetic track T gradually decreases (namely subtracting magnetic).This phenomenon is referred to as adjacent track interference (ATI).

If the magnetic that subtracts of magnetic track T develops under the influence of ATI, error rate when reading data from magnetic track T also increases.Most Eventually, even if attempting the data of reparation magnetic track T using error correcting code (ECC) to greatest extent, it is also difficult to repair the data.As a result, The result is that data disappear.Until magnetic track T data disappear until, to adjacent track data write number according to write access mould Formula (write access pattern) and it is different.

Therefore, it is necessary to become unable in the influence due to ATI from magnetic track T into line number in disc driver in recent years Before reading, the rewriting (magnetic track refreshing) for recovering the magnetization of magnetic track T is carried out.Refreshed by the magnetic track, recover magnetic The magnetization of road T.

The content of the invention

Embodiments of the present invention provide a kind of disc driver and the method for controlling rewriting data, can be based on at least The intensity for the influence that the data write-in of 2 magnetic tracks brings the magnetic track between 2 magnetic tracks, this 2 are rewritten on suitable opportunity The data of magnetic track between magnetic track.

The disc driver of embodiment includes disk, head and controller.The disk has the multiple magnetic for including the first magnetic track Road.The head is configured to write data to the disk, and reads data from the disk.The controller is configured to utilizing The head is controlled to the data write-in of the disk and from the digital independent of the disk.The controller is configured to：Pass through The first counter associated with first magnetic track and the second counter manage magnetic track in the range of outside adjacent track and interior The influence that the data write-in that magnetic track in the range of adjacent track carries out respectively brings first magnetic track.The outer adjacent track Scope is adjacent in the outside of first magnetic track and at least one magnetic track.The interior adjacent track scope is in first magnetic The inside in road is adjacent and at least one magnetic track.First counter and second counter are represented respectively to described outer Magnetic track in the range of magnetic track and the interior adjacent track in the range of adjacent track carries out the number of data write-in.The controller Based on first counter and the respective value of the second counter, read the data of first magnetic track and read this Data to first magnetic track rewrite.

Description of the drawings

Fig. 1 is the block diagram for the typical structure for representing the disc driver that embodiment is related to.

Fig. 2 is the figure for the example for representing the information that control memory shown in FIG. 1 is stored.

Fig. 3 is the figure for the data structure example for representing write instruction log sheet shown in Fig. 2.

Fig. 4 is the figure for the data structure example for representing write-in monitoring form in both sides shown in Fig. 2.

Fig. 5 is the figure for the data structure example for representing write-in counter table shown in Fig. 2.

Fig. 6 is the figure for the data structure example for representing write-in set information shown in Fig. 2.

Fig. 7 is for illustrating the flow chart of the exemplary steps of the write-in processing of the embodiment.

Fig. 8 is for illustrating that the writing address in flow chart shown in Fig. 7 confirms the flow chart of the exemplary steps of processing.

Fig. 9 is for illustrating the flow chart of the exemplary steps of the update processing of the first table in flow chart shown in Fig. 8.

Figure 10 is for illustrating the flow chart of the exemplary steps of the update processing of the second table in flow chart shown in Fig. 8.

Specific embodiment

Hereinafter, with reference to the accompanying drawings of embodiments of the present invention.

Fig. 1 is the block diagram for the typical structure for representing the disc driver that embodiment is related to.Disc driver shown in FIG. 1 Also referred to as hard disk drive (HDD), including disk (disk) 11, head (magnetic head) 12, spindle motor (SPM, spindle motor) 13rd, actuator 14, driver IC 15, head IC16, temperature sensor 17 and controller 18.

Disk 11 is, for example, the magnetic recording media that the recording surface of magnetic recording data is useful in two mask.Pass through SPM13 Disk 11 is made to rotate at a high speed.SPM13 is driven by the driving current (or driving voltage) supplied from driver IC 15.

Disk 11 (being further specifically each recording surface of disk 11) has multiple magnetic tracks of such as concentric circles and multiple Servo area.Multiple servo areas are radial in the radial direction of disk 11 and equally spaced discrete in the circumferencial direction of the disk 11 Configuration.It is used as data area between adjacent servo area in each magnetic track.Include servo area and watching with this in each magnetic track The region for taking the adjacent data area in region is known as servo sector (servo sector).It is fanned with multiple data data area Area.

There is servo data in servo area record.Servo data includes servo mark, address date and servo bursty data (サーボバーストデータ).Servo mark includes the particular code (mode signal for identifying corresponding servo sector (pattern signal)).Address date includes the address (namely cylinder address) for the magnetic track answered and corresponding servo sector Address (namely servo sector address).Servo bursty data includes being used for detector 12 compared with corresponding magnetic track for example Deviate the data (so-called station-keeping data) of (site error) in the position of center line.

First 12 accordingly configure with a recording surface of disk 11.In addition in Fig. 1, it is omitted for the ease of mapping and disk 11 another recording surface corresponds to the head of configuration.But in the following description, the head is also denoted as first 12 sometimes.

First 12 are installed on the top of actuator 14.First 12 rotate to float on the disk 11 at a high speed by disk 11.Actuator 14 have the voice coil motor (VCM) 140 of the driving source as the actuator 14.VCM140 is by the driving that is supplied from driver IC 15 Electric current (voltage) drives.Driven by actuator 14 by VCM140, so as to first 12 on the radial direction of disk 11 to describe circular arc Mode moved on the disk 11.

In the structure of fig. 1, it is assumed that there is the disc driver of single disc 11.But disk 11 can configure multiple.This Outside, in the structure of fig. 1, disk 11 has recording surface in two face.It however, it can be that 11 only one face of disk has record Face accordingly configures first 12 with the recording surface.

Driver IC 15 drives according to the control of controller 18 (being further specifically the CPU184 in controller 18) Dynamic SPM13 and VCM140.Head IC16 includes head amplifier, to being read by first 12 (being further specifically first 12 reading elements) The signal (namely reading signal) taken is amplified.Head IC16 further includes write driver, will be by controller 18 (further in detail It is the R/W passages (channel) 181 in controller 18 for thin) the write-in data sent out are converted to reset current, and this is write Enter electric current and send out 12 (being further specifically first 12 write element) to the end.Temperature sensor 17 detects magnetic shown in FIG. 1 The temperature (environment temperature) of disk drive.

Controller 18 is for example using referred to as System-on-Chip (SOC, the system that multiple element is integrated in one chip Single-chip) LSI and realize.Controller 18 include read/write passage (R/W passages) 181, hard disk controller (HDC) 182, Caching 183, CPU184, flash memory 185 and control memory 186.

181 pairs of R/W passages are handled with the relevant signal of read/write.R/W passages 181 will read signal digitlization, And from the data after the digitlization to reading data into row decoding.R/W passages 181 are also from the positioning institute of digital data extraction first 12 The servo data needed.R/W passages 181 will also write data encoding.

HDC182 is connected via host interface 19 with host.From the next instruction of host transmission, (write-in refers to for HDC182 receptions It makes, read instruction etc.).HDC182 controls the data between host and the HDC182 to transmit.HDC182 also controls R/W passages 181 Data transmission between the HDC182.

183S is cached to form using volatile memory, such as RAM.Caching 183 should write disk 11 for temporarily storing Write data (also specifying the write instruction that the write-in data are write to disk 11) and from disk 11 via first 12, head IC16 and R/W The data that passage 181 is read.

CPU184 plays a role as the master controller of disc driver.CPU184 is controlled according to control program 210 (Fig. 2) Other at least a portion elements in disc driver.Flash memory 185 is rewritable non-volatile as nand flash memory Memory.Control program 210 is for example previously stored in flash memory 185.Control memory 186 is volatibility as such as RAM Memory.

Fig. 2 expressions are stored in the example of the information in control memory 186 shown in FIG. 1.As shown in Fig. 2, control storage Storing control program 210, write instruction daily record (WCL) table 220, both sides write-in monitoring (BSWM) table 230, write-in in device 186 Counter (WC) table 240 and write-in 250 each information of set information.

In the present embodiment, control program 210 is stored in flash memory 185 as described so, disk drive shown in Fig. 1 When device starts, control memory 186 is loaded into from the flash memory 185.On the other hand, WCL tables 220, BSWM tables 230, WC tables 240 and Write-in set information 250 is stored in the system realm of disk 11, and when disc driver starts, control is loaded into from the system realm Memory 186.System realm is in order to which storage system (for example, controller 18) is managed information used.Disk 11 is in system There is user area outside region.User area is the storage region that can be used by user.

Fig. 3 represents the data structure example of WCL tables 220 shown in Fig. 2.Each entry of WCL tables 220 is used to store write instruction Daily record (WCL).WCL (log information) includes writing address information and control label information.

Writing address information includes physical address and block (block) counts data.Physical address is referred to by that will show by write-in The logical address (it is, starting logical address) of the specified write-in destination (the write-in destination of beginning) of order is into row address It converts and obtains.Physical address represents the physical location on disk 11, is numbered including cylinder number (it is, cylinder address), head And sector number (data sector number).In general, logical address uses logical block address.

Block number data are represented as the size (being herein the block number of write-in data) of the write-in data specified by write instruction. In present embodiment, the size of 1 block is in the same size with 1 sector (data sector), therefore the block number shown in block number data It is consistent with sector number.

Label information is controlled to include -1 mark (the first mark) and+1 mark (the second mark).- 1 mark and+1 mark table Show whether the data write-in to corresponding magnetic track has been reflected in adjacent track (the outer adjacent magnetic in the outside of magnetic track corresponding with this respectively Road) and inside adjacent track (interior adjacent track) associated BSWM tables 230 entry in.Corresponding magnetic track refers to mark with control Remember the magnetic track shown in the paired writing address information of information.

Fig. 4 represents the data structure example of BSWM tables 230 shown in Fig. 2.BSWM tables 230 have and each magnetic track phase on disk 11 Associated entry.Each entry of BSWM tables 230 monitors (BSWM) information for storing both sides write-in.BSWM information is represented to correspondence The monitoring result of the respective data write-in of adjacent track (it is, outer adjacent track and interior adjacent track) of the both sides of magnetic track. BSWM information includes representing that the cylinder number of corresponding magnetic track and head number this pair.(below, BSWM information further includes negative counter Referred to as-CTR) and positive counter (hereinafter referred to as+CTR) this is a pair of.- CTR (the first counter) and+CTR (the second counter) It is by representing respectively based on to the software of the number for the data write-in that the outer adjacent track of corresponding magnetic track and interior adjacent track carry out Number device.

Fig. 5 represents the data structure example of WC tables 240 shown in Fig. 2.WC tables 240 have associated with each magnetic track on disk 11 Entry.Each entry of WC tables 240 writes counter (WC) information for storing.WC information includes representing the cylinder of corresponding magnetic track Number and head number this pair of and write-in counter (hereinafter referred to as WT_CTR).WT_CTR (the 3rd counter) is for dividing The software counter for the number that the data carried out to the adjacent track of corresponding magnetic track write is not represented.

In addition, be shown respectively by-CTR ,+CTR and WT_CTR data write-in number be weighting after (after standardization) Number, be not actual data write-in number.It will be aftermentioned on weighting.

Fig. 6 represents the data structure example of write-in set information 250 shown in Fig. 2.Writing set information 250 includes rewriteeing threshold Value information 251, write-in counter update (WCU) coefficient information 252 and magnetic track deviate (OT) write-in piece (ス ラ イ ス) information 253。

Rewriteeing threshold information 251 is included for the threshold value based on the rewriting (WCB rewritings) for writing counter (hereinafter referred to as WCB rewrites threshold value) and for rewriting threshold value (the hereinafter referred to as BSWMB of the rewriting (BSWMB rewritings) monitored based on both sides write-in Rewrite threshold value).WCB is rewritten threshold value and represents to be started the weight of the data of (execution) corresponding magnetic track based on the WT_CTR in WC tables 240 Threshold value when writing.BSWMB rewrites threshold value and represents to start corresponding magnetic track based on this pair of-CTR in BSWM tables 230 and+CTR Data rewriting when threshold value.

WCU coefficient informations 252 are for example including 3 temperatures coefficient (the first coefficient), 3 coefficients of region (the second coefficient) and 2 A write-in retries coefficient (the 3rd coefficient).Temperature coefficient, coefficient of region and the write-in selected respectively from these coefficients retry and are Number is used as weight during each value to WT_CTR ,-CTR and+CTR addition is determined.

3 temperatures coefficient are associated with 3 temperature levels (temperature range), such as low temperature, room temperature and high temperature respectively.It is based on When writing data to goal track, by environment temperature (the corresponding environment for the disc driver that temperature sensor 17 detects Temperature) it is low temperature, room temperature or high temperature, and select one in 3 temperatures coefficient.3 temperatures coefficient represent corresponding respectively Influence of the environment temperature to ATI intensity.In the example of fig. 6, it is selected when temperature levels are low temperature and room temperature The temperature coefficient of (application) is the temperature coefficient of benchmark, is 1.0.In contrast, the selected temperature when temperature levels are high temperature It is, for example, 1.3 to spend coefficient, that is, 1.3 times of benchmark.It is, it is high temperature that temperature coefficient 1.3, which is allowed in temperature levels, When the influence of ATI that is brought to adjacent track, compared with temperature levels is the situations of low temperature or room temperature increasing 30% sets 's.

3 coefficients of region respectively with the scope of 3 radial directions on disk 11 (region), for example outside, center and inside It is associated.Based on when writing data to goal track, which in the outside on disk 11, center and inside which is located at A region (it is, the radial location of goal track on disk 11), and select one in 3 coefficients of region.Fig. 6's In example, when goal track is located at the middle section on disk 11, selected coefficient of region is the coefficient of region of benchmark, is 1.0.In contrast, when goal track is located at outside (inside) on disk 11, selected coefficient of region is 1.1 (1.2), is 1.1 times (1.2 times) of benchmark.The intensity that the position of radial direction of such, goal track on disk 11 affects ATI Difference, be since goal track is (further specifically, at the position of the radial direction for goal track on disk 11 The tangent line of circumference) with the difference of first 12 angulation (it is, angle of skew) caused by.

2 write-in retry coefficient with to goal track data write-in whether be magnetic track deviate (OT) write retry it is related Connection.OT write-ins retry performed when referring to be written with data to the goal track under OT states retry (write-in retries).OT State is the state that finger 12 deviates from such as center line of goal track more than datum quantity (or baseline scale).Based on to Whether it is that OT write-ins retry when goal track writes data, and selects 2 and write one retried in coefficient.In the example of Fig. 6 In son, it is not that the write-in that selected write-in is retried on the basis of coefficient when OT write-ins retry retries coefficient in data write-in, is 1.0.In contrast, it is 1.5 that data write-in, which is that selected write-in retries coefficient when OT write-ins retry, that is, the 1.5 of benchmark Times.

In addition, low temperature relevant with temperature coefficient, room temperature and the actual temp scope of high temperature and temperature coefficient (temperature Scope) quantity, if such as type or characteristic of disc driver according to figure 1, the ATI also required influence essence It spends and sets.This setting for retrying coefficient for coefficient of region, write-in is also similary.It for example, can be by multiple write-in weights The number that examination coefficient is retried with OT write-ins is set in association.

OT write-in pieces information 253 includes such as 2 OT write-in chip value.2 OT write-in chip value respectively with goal track (herein For the magnetic track that data should write, that is, write magnetic track) (further specifically, be with BSWM (both sides write-in monitors) magnetic track Be registered in any one in the BSWM magnetic tracks of BSWM tables 230) between position relationship, i.e. non-adjacent and adjacent any phase Association.BSWM magnetic tracks refer to that at least one party of-CTR and+CTR in the BSWM information for being stored in the entry of BSWM tables 230 are Cylinder number during non-zero, in the BSWM information and head number the magnetic track shown in this pair.2 OT write-ins chip value represent respectively Permitted first 12 position offset when making first 12 to write data to the goal track positioned at goal track.In this implementation In mode, OT write-in chip value, using permitted position offset compared with the ratio of track width as permitted position offset It measures and represents.When writing data to goal track, based on which of the goal track and the BSWM magnetic tracks for being registered in BSWM tables 230 One adjacent and select one in 2 OT write-in chip value.In the example of fig. 6, the selected OT write-ins when non-adjacent Chip value is 10%.In contrast, selected OT write-ins chip value is 6% when adjacent.OT write-in chip value 6% allow for When the adjacent magnetic track of goal track is BSWM magnetic tracks, first 12 position offset is to adjacent track (it is, the BSWM magnetic tracks) band The influence of ATI that the influence of the ATI come is brought when being more than non-adjacent and set.

Then, by taking write-in is handled as an example, the action of present embodiment is illustrated with reference to Fig. 7 to Figure 10.Fig. 7 is for illustrating this The flow chart of the exemplary steps of the write-in processing of embodiment, Fig. 8 is the writing address for illustrating in flow chart shown in Fig. 7 Confirm the flow chart of the exemplary steps of processing.Fig. 9 is for illustrating the allusion quotation of the update processing of the first table in flow chart shown in Fig. 8 The flow chart of type step, Figure 10 are for illustrating the stream of the exemplary steps of the update processing of the second table in flow chart shown in Fig. 8 Cheng Tu.The write-in processing of present embodiment is roughly divided into the first feelings that the write access pattern being affected by ATI is not detected Shape and the second situation for detecting the write access pattern being affected by ATI.

Illustrate the write-in processing of the first situation first.It is now assumed that being, HDC182 is received via host interface 19 by host The write instruction and write-in data are stored in caching 183 (box 701) by the write instruction of submitting and write-in data.In addition, by The write instruction that HDC182 is received is given CPU184.The write instruction includes representing patrolling for write-in destination as well-known It collects address (for example, logical block address) and represents the block number data of write-in block number (sector number).

CPU184 uses such as address mapping table, and the logical block address for representing write-in destination is transformed on indicating panel 11 Physical location physical address (it is, include cylinder number, head number and sector number physical address).Based on the object Address and block number are managed, CPU184 determines that the writing position on the disk 11 specified by the write instruction from host is (further detailed For, it is as the writing position shown in physical address and block number) (box 702).Herein for the purpose of simplifying the description, by writing position (writing range) is set to some or all of sector of 1 magnetic track.Therefore, in the following description, the write-in that will be determined Position is known as magnetic track or write-in magnetic track.

Then, the magnetic track determined that CPU184 will be stored on the write-in data write-in disk 11 of caching 183 by first 12 (namely writing magnetic track) (box 703).For the write-in of the data, CPU184 plays a role as servo controller, is based on The servo data extracted by R/W passages 181 controls driver IC 15.By the control, CPU184 makes first 12 on disk 11 Write that magnetic track (goal track) is mobile (lookup action), then making this, first 12 (head is fixed positioned at such as center line of the write-in magnetic track Position action).

In above-mentioned head positioning, whether CPU184 judges write-in magnetic track with being registered in the BSWM tables with reference to BSWM tables 230 Some of BSWM magnetic tracks in 230 is adjacent.Namely CPU184 judgements include the write-in for representing the adjacent track of write-in magnetic track Whether the BSWM information including address information has been registered in BSWM tables 230.If it is adjacent with a certain BSWM magnetic tracks to write magnetic track, Namely write magnetic track adjacent track be BSWM magnetic tracks (being registered in the magnetic track in BSWM tables 230), then CPU184 selection with " adjacent " associated OT write-in chip value (being herein 6%).In contrast, if write-in magnetic track and which BSWM magnetic track not phases Neighbour, then CPU184 select OT associated with " non-adjacent " write-in chip value (being herein 10%).

Also, CPU184 (further specifically, is servo data based on the servo data extracted by R/W passages 181 In servo bursty data), calculate first 12 repeatedly compared with write-in magnetic track with time interval for example corresponding with servo sector The offset of center line.Also, if the offset calculated is more than the allowed band shown in selected OT write-in chip value, CPU184, which makes to write to the data of write-in magnetic track, to be waited.In contrast, if first 12 offset writes chip value in selected OT In shown allowed band, then CPU184 writes data (box 703) by first 12 to write-in magnetic track as described above.But During to write-in magnetic track write-in data, the offset there is also first 12 is more than the situation of allowed band.In this case, CPU184 is reattempted in box 703 to be write to the data of write-in magnetic track.

According to the present embodiment, when write-in magnetic track is adjacent with a certain BSWM magnetic tracks, CPU184 selections are related to " adjacent " The OT write-ins chip value of connection, the OT of value namely smaller than OT associated with " non-adjacent " write-ins chip value write chip value.In this way, The write-in magnetic track position offset so as to have first 12 adjacent with a certain BSWM magnetic tracks may aggravate the ATI influences on adjacent track In the case of, CPU184 writes chip value using the OT of small value.Thereby, it is possible to exclude to make the ATI on adjacent track influence aggravation because Element.

When CPU184 has performed the data write-in (box 703) to write-in magnetic track, the state (box of data write-in is obtained 704).Data write-in state for example including detected by temperature sensor 17 the data write-in execution when environment temperature Degree.The state of data write-in further includes radial location (writing position) and write-in of the write-in magnetic track on disk 11 and retries (OT write-ins Retry) number.

Then, the state that CPU184 is write based on acquired data updates and the both sides of write-in magnetic track as follows WT_CTR (following, the titles of entry in the associated WC tables 240 of adjacent track (outer adjacent track and interior adjacent track) difference For first and second WT_CTR) (box 705).First, divided and updated first and second WT_CTR respectively, CPU184 is from WCU Coefficient information 252 selects the state write with acquired data, and (namely environment temperature, writing position and write-in retry secondary Number) corresponding temperature coefficient (TC), coefficient of region (ZC) and write-in retry coefficient (WRC).

Then, CPU184 be based on selected temperature coefficient (TC), coefficient of region (ZC) and write-in retry coefficient (WRC), With write-in number (WC), the value (additive value) of first and second WT_CTR additions is tackled in (1) calculating as the following formula respectively：

Additive value=WC × TC × ZC × WRC (1)

.Here, write-in number (WC) refers to the number of the data write-in in box 703, that is, retried including write-in The number of data write-in including number (1+ writes number of retries).

After CPU184 calculates additive value, value respective to first and second WT_CTR adds the additive value of the calculating respectively. The respective values of first and second WT_CTR are increased by the additive value of calculating as a result,.

Here, retried not carrying out write-in, and temperature coefficient (TC), coefficient of region (ZC) and write-in retry coefficient (WRC) when and write-in number (WC) is 1.0, the respective values of first and second WT_CTR add write-in samely Number (WC).In contrast, retrying at least one of coefficient (WRC) in temperature coefficient (TC), coefficient of region (ZC) and write-in is not When 1.0 (further specifically, than 1.0 big), the respective values of first and second WT_CTR with it is in the past different, add than writing The big value of indegree (WC).That is, the respective values of first and second WT_CTR are not representing the reality to write-in magnetic track The number of data write-in, but represent the intensity that the ATI that brings of the adjacent track based on the both sides on the write-in magnetic track influences and The number for the data write-in that weighting (standardization) forms will be write to the data of the write-in magnetic track.

In addition, in box 703, it can every time perform to during the data write-in of write-in magnetic track, calculated according to above-mentioned formula Additive value, and the additive value of the calculating is added with the respective values of first and second WT_CTR.It it is, can be in the side of execution During the first time data write-in of frame 703, the calculating of the additive value of first time and the addition of the additive value are performed, if then into row write Enter to retry, then the calculating of additive value and the addition of the additive value are performed when each write-in retries.In this case, as above-mentioned Formula in write-in number (WC) use 1.

In the present embodiment, when being written with data to write-in magnetic track (goal track), CPU184 updates and the write-in magnetic The WT_ of entry in the associated WC tables 240 of adjacent track (outer adjacent track and interior adjacent track) difference of the both sides in road CTR (first and second WT_CTR).But as described below, CPU184 can also pair with write-in magnetic track both sides write with this Each magnetic track entered in the adjacent magnetic track scope of magnetic track (outer adjacent track scope and interior adjacent track scope) distinguishes associated WC The WT_CTR of entry in table 240 is updated.Outer adjacent track scope and interior adjacent track scope respectively have the number more than 1 Measure the magnetic track of (the first quantity).Present embodiment is that outer adjacent track scope and interior adjacent track scope respectively have 1 magnetic track Situation, that is, it is equivalent to the situation that the first quantity is 1.

Here, by the outer adjacent track scope on the basis of writing magnetic track during position (the 0th) and interior adjacent track scope The magnetic track of i-th (i is the integer bigger than 0) during (two adjacent track scopes) is respective is denoted as magnetic track i.It in addition, will be with magnetic track i phases The WT_CTR of entry in associated WC tables 240 is denoted as WT_CTR (i).

The intensity that data write-in to write-in magnetic track influences the ATI that magnetic track i is brought, often relies on i (it is, phase The relative position of magnetic track i in adjacent magnetic track scope), the bigger magnetic track i of the value of i is more difficult to be influenced be subject to ATI.It therefore, can be with Increase new coefficient (hereinafter referred to as track location coefficient) corresponding with the value of i.In this case, CPU184 can be based on temperature Coefficient (TC), coefficient of region (ZC), write-in retry coefficient (WRC) and track location coefficient (TPC) and write-in number (WC), according to Following formula (2) calculates the value (additive value) that reply WT_CTR (i) is added：

Additive value=WC × TC × ZC × WRC × TPC (2)

.Here, track location coefficient (TPC) corresponding with i=1 (outer adjacent track and interior adjacent track) can be with use example Such as 1.0.In addition, track location coefficient (TPC) can be set in a manner that the ascending order according to i becomes smaller.

In addition, CPU184 enters box 706 after performing box 705.In box 706, CPU184 will be received in box 701 Log information, the namely WCL (hereinafter referred to as the first WCL) of write instruction be appended to WCL tables 220.First WCL includes The writing address information and 2 controls for representing the writing position (position of write-in magnetic track) on disk 11 are marked (it is, -1 Mark and+1 mark).At the time of the first WCL is appended to WCL tables 220, in the first WCL -1 mark and+1 mark all by It resets.

<PN 143345>

Then, CPU184 performs writing address confirmation processing (box 707).Writing address confirmation processing refers to confirm With the presence or absence of the place for the WCL (the 2nd WCL) for meeting first or second condition as described below in the group of WCL in WCL tables 220 Reason.The first or second condition refers to that WCL is represented from this writing position (the first writing position) to the inside of disk 11 or outer Side deviates the writing position (the second writing position) of 2 magnetic tracks.First or second condition further includes write Sector Range ( Two Sector Ranges) with the Sector Range (the first Sector Range) of this writing position there is at least a portion to repeat.

In the present embodiment, cylinder number increases to the interior direction of disk 11.Therefore in the present embodiment, as expression The mark of the inside of disk 11 and use+, the mark in the outside as indicating panel 11 and use-.It in addition, will be from writing position ( One writing position) to the position of the N number of magnetic track of offset inboard of disk 11+N is denoted as, the magnetic track of the position is denoted as to the magnetic of+N sides Road.Equally, the position of N number of magnetic track is denoted as-N by the lateral offset from writing position (the first writing position) to disk 11, by this The magnetic track of position is denoted as the magnetic track of-N sides.Moreover, this case that will offset by N number of magnetic track inwardly be denoted as offseting by+N magnetic tracks, N number of magnetic track this case will be offset by outward to be denoted as offseting by-N magnetic tracks.

CPU184 performs above-mentioned writing address confirmation according to flow chart shown in Fig. 8 and handles (box 707) as follows. CPU184 first will be from 1 WCL (still, except the first WCL) that WCL tables 220 take out as the 2nd WCL and from the WCL tables 220 take out (box 801).Then CPU184 compares writing address information (the second writing address information) in the 2nd WCL and the Writing address information (the first writing address information) (box 802) in one WCL.

CPU184 is based on this comparison as a result, judge the second writing position (position of the 3rd magnetic track) phase shown in the 2nd WCL For this writing position, i.e. the first writing position (position of the second magnetic track) shown in the first WCL whether meet first or Second condition (box 803).That is CPU184 judges whether comparative result meets first or second condition.

Specifically, it is located at+2 sides of the second magnetic track shown in the first WCL (also in the 3rd magnetic track shown in the 2nd WCL It is the position of+2 magnetic tracks from the second track skew) and at least a portion of Sector Ranges in two write-in magnetic tracks when repeating, CPU184 is determined as that comparative result meets first condition.In addition, it is located in the 3rd magnetic track shown in the 2nd WCL shown in the first WCL The second magnetic track -2 sides (it is, from the second track skew the position of -2 magnetic tracks) and two write-in magnetic tracks in sector When at least a portion of scope repeats, CPU184 is determined as that comparative result meets second condition.Here, Sector Range is by write-in ground Sector number and block number in the information of location represent.

If comparative result meets first condition, CPU184 is judged as detecting that being influenced big first be subject to ATI writes visit Ask pattern.In this case, CPU184 performs the first table update processing (box 804), subsequently into box 806.If in addition, than Relatively result meets second condition, then CPU184, which is judged as detecting, is influenced the second big write access pattern be subject to ATI.In the situation Under, CPU184 performs the second table update processing (box 805), subsequently into box 806.

In contrast, if which of comparative result and first and second condition does not comply with, CPU184 is judged as not examining Measure is influenced big write access pattern (first or second write access pattern) be subject to ATI.In this case, CPU184 skip blocks 804 or box 805 enter box 806.

Here, it is set to：If be judged as comparative result and first and second condition which do not comply with if into box 806.In this case, in box 806, CPU184 judges whether there is the WCL not yet taken out in box 801 in WCL tables 220.Such as There is the WCL (box 806 be) not taken out in fruit, CPU184 returns to box 801, using do not take out 1 WCL as the 2nd WCL And it is taken out from WCL tables 220.Later action is identical with the above situation.

In the present embodiment, it is set to：Shown in all WCL (the 2nd WCL) in addition to the first WCL in WCL tables 220 Magnetic track (the 3rd magnetic track) and the second Sector Range compared with the second magnetic track and the first Sector Range shown in the first WCL, first And which is all unsatisfactory for second condition.It is, it is set to：There is no the WCL for meeting first or second condition in WCL tables 220. In this case, the first table update processing (box 804) and the second table update processing (box 805) all also do not perform once, just Terminate writing address confirmation processing (box 707).

Fig. 7 is returned to, CPU184 is based on rewriteeing the decision rewriting condition of threshold information 251 (box 708).More specifically, exist In the case that first table update processing and the second table update processing all once also terminate writing address confirmation processing without performing, CPU184 rewrites threshold value to determine rewriting condition based on the WCB rewritten in threshold information 251 (first rewrites condition).That is CPU184 It will be more than that WCB rewrites threshold value in the value of at least one party of 705 first and second updated WT_CTR of box, be determined as first Rewriting condition.

Then CPU184 is based on the respective values of first and second updated WT_CTR and WCB rewrites threshold determination first Whether rewriting condition is true (box 709).If the value of at least one party of first and second updated WT_CTR is more than WCB Threshold value is rewritten, then CPU184 is determined as that the first rewriting condition sets up (box 709 be).Here, it is set to only the first WT_CTR's Value rewrites threshold value more than WCB.In this case, CPU184 will in by WC tables 240 with the first WT_CTR (the 3rd counter) phase Associated cylinder number and head number the data of magnetic track (the 5th magnetic track) write-in shown in this pair, using first 12 to the magnetic track weight It writes (box 710).

Then CPU184 by the first WT_CTR (it is, being stored in WC tables 240 and the magnetic track with being rewritten is associated WT_CTR) it is initialized as 0 (it is, clearing) (box 711).In addition, CPU184 will be stored in BSWM tables 230 and with being weighed Associated-the CTR and+CTR of magnetic track write is initialized as 0 (box 712).Thus CPU184 terminates write-in processing.

In addition, the value in the 2nd WT_CTR is more than in the case that WCB rewrites threshold value, the value with the first WT_CTR is also performed It is similarly rewritten when rewriteeing threshold value more than WCB.Also, according to the rewrite action, the 2nd WT_CTR and the magnetic track with being rewritten Associated-CTR and+CTR is initialised.

Then, writing for the second situation (it is, detecting the second situation that big write access pattern is influenced by ATI) is illustrated Enter processing.First, the box 701 to 706 of flow chart shown in Fig. 7 is performed in the same manner as above-mentioned first situation.Then, according to figure Flow chart shown in 8 performs writing address confirmation processing (box 707).That is, for whole WCL in WCL tables 220, hold repeatedly Row box 801 to 803.

Here, taking out the 2nd WCL (box 801) from WCL tables 220, by the writing address information in the 2nd WCL, (second writes Enter address information) compared with the writing address information (the first writing address information) in the first WCL (box 802).In the situation Under, CPU184 is similary with the first foregoing situation, judges the second writing position the (the 3rd shown in the 2nd WCL based on comparative result The position of magnetic track) compared with this first writing position (position of the second magnetic track) shown in the first WCL whether meet first Or second condition (box 803).

Hereinafter, action when compared result (it is, comparative result of box 802) meets first condition is said It is bright.In this case, CPU184 performs the first table update processing (box 804) as follows according to flow chart shown in Fig. 9.It is first First CPU184 determines whether to be provided with and is somebody's turn to do -1 mark (box 902) with reference to -1 mark (box 901) in the 2nd WCL.

If -1 mark in the 2nd WCL is not set (box 902 no), CPU184 is judged as to the 2nd WCL The data write-in of the 3rd shown magnetic track be not yet reflected in the 3rd magnetic track-adjacent track in side (outside) (also It is the magnetic track of -1 side)+CTR in the entries of associated BSWM tables 230.Here, since comparative result meets first condition, Therefore the 3rd magnetic track is located at+2 sides of the second magnetic track shown in the first WCL.Therefore CPU184 be judged as the second magnetic track with this second Magnetic track (it is, magnetic track of+1 side of the second magnetic track) between the magnetic track (the 3rd magnetic track) of+2 sides of magnetic track is influenced be subject to ATI Greatly.

In this case, CPU184 pairs with the magnetic track of+1 side of the second magnetic track, the magnetic track of namely -1 side of the 3rd magnetic track + CTR in the entry of (the 4th magnetic track) associated BSWM tables 230 is updated (box 903).In the present embodiment, should Formula (1) used calculates when update additive value used is according to update WT_CTR.But additive value can also be used with writing The consistent value of the namely actual write-in number of indegree (WC).

In addition, CPU184 sets -1 mark (side in the 2nd WCL (it is, being stored in the 2nd WCL of WCL tables 220) Frame 904).The data write-in to the 3rd magnetic track performed as a result, before -1 mark expression in the 2nd WCL has been reflected in being somebody's turn to do + CTR in the entry of magnetic track (the 4th magnetic track) associated BSWM tables 230 of -1 side of the 3rd magnetic track.CPU184 performs box Enter box 905 after 903 and 904.

On the other hand, if -1 mark in the 2nd WCL has been set (box 902 be), CPU184 is judged as to the The data write-in of the 3rd magnetic track shown in two WCL has been reflected in related to the magnetic track of -1 side of the 3rd magnetic track (the 4th magnetic track) + CTR in the entry of the BSWM tables 230 of connection.In this case, CPU184 skip blocks 903 and 904 enter box 905.By This, prevents the data write-in to the 3rd magnetic track shown in the 2nd WCL from repeating to be reflected in the magnetic track phase with -1 side of the 3rd magnetic track + CTR in the entry of associated BSWM tables 230.

In box 905, CPU184 is with reference to+1 mark in the first WCL.And CPU184 judges+1 mark in the first WCL Whether note is provided with (box 906).

If+1 mark in the first WCL is not set (box 906 no), CPU184 is judged as that this data are write Enter (it is, to the second magnetic track shown in the first WCL data write) be not yet reflected in second magnetic track+side (inside) Adjacent track (it is, magnetic track of+1 side) associated BSWM tables 230 entry in-CTR.In this case, CPU184 enters box 907.

In box 907, CPU184 updates and+1 side of the second magnetic track in the same manner as the update (box 903) of above-mentioned+CTR - CTR in the entry of magnetic track (the 4th magnetic track) the associated BSWM tables 230 of (namely -1 side of the 3rd magnetic track).In addition, CPU184 sets+1 mark (box 908) in the first WCL (it is, being stored in the first WCL of WCL tables 220).As a result, + 1 mark in one WCL represents that this data write-in to the second magnetic track performed has been reflected in and+1 side of second magnetic track - CTR in the entry of the associated BSWM tables 230 of magnetic track.CPU184 terminates after performing box 907 and 908 at the first table update It manages (box 804).

On the other hand, if+1 mark in the first WCL has been set (box 906 be), CPU184 is judged as to the The data write-in (this data write-in) of the second magnetic track shown in one WCL has been reflected in the magnetic track with+1 side of second magnetic track - CTR in the entry of (the 4th magnetic track) associated BSWM tables 230.In this case, CPU184 skip blocks 907 and 908 And terminate the first table update processing (box 804).By skip block 907 and 908, prevent to the second magnetic shown in the first WCL Road data write-in repeat be reflected in the entry of BSWM tables 230 associated with the magnetic track of+1 side of second magnetic track- CTR。

Then, action when meeting second condition to the comparative result of box 802 illustrates.In this case, CPU184 performs the second table update processing (box 805) as follows according to flow chart shown in Fig. 10.At the second table update Reason and above-mentioned the first table update processing (box 804) are similary.For this purpose, omit the detailed description of the second table update processing.If have Need, can the first above-mentioned table update processing in incite somebody to action+be changed to-, incite somebody to action-be changed to+.

CPU184 first judges that being somebody's turn to do+1 marks whether to be provided with (side with reference to+1 mark (box 1001) in the 2nd WCL Frame 1002).If+1 mark in the 2nd WCL is not provided with (box 1002 no), CPU184 enters box 1003.

In box 1003, CPU184 couples of magnetic track, namely the 2nd WCL with -1 side of the second magnetic track shown in the first WCL - CTR in the entry of magnetic track (the 4th magnetic track) associated BSWM tables 230 of+1 side of the 3rd shown magnetic track is updated. In addition, CPU184 sets+1 mark (box 1004) in the 2nd WCL.+ 1 mark in the 2nd WCL performs before representing as a result, The data write-in to the 3rd magnetic track be reflected in the entries of BSWM tables 230 associated with the magnetic track of+1 side of the 3rd magnetic track In-CTR.

CPU184 enters box 1005 after performing box 1003 and 1004.On the other hand, if+1 in the 2nd WCL marks Set (box 1002 be), then CPU184 skip blocks 1003 and 1004 and enter box 1005.In box 1005, CPU184 With reference to -1 mark in the first WCL.And CPU184 judges that -1 in the first WCL marks whether to be provided with (box 1006)。

If -1 mark in the first WCL is not provided with (box 1006 no), CPU184 enters box 1007.In side In frame 1007, magnetic track (the 4th magnetic of the magnetic track of -1 side of CPU184 updates and the second magnetic track, namely+1 side of the 3rd magnetic track Road) associated BSWM tables 230 entry in+CTR.In addition, CPU184 sets -1 mark (box in the first WCL 1008).CPU184 terminates the second table update processing (box 805) after performing box 1007 and 1008.

On the other hand, if -1 mark in the first WCL has been set (box 1006 be), CPU184 skip blocks 1007 and 1008 and terminate the second table update processing (box 805).

CPU184 terminates the first table update processing (box 804) or the second table update processing (box 805) enters box afterwards 806.In box 806, whether CPU184 judgements have the WCL not yet taken out in box 801 in WCL tables 220.If there is not taking The WCL (box 806 be) gone out, then CPU184 returns box 801,1 WCL not taken out is taken out from WCL tables 220 as second WCL.Later action is similary with the above situation.

Finally, whole WCL (the 2nd WCL) in addition to the first WCL in WCL tables 220 are removed, as a result in WCL tables The not remaining WCL (box 806 no) not taken out in 220.In this case, CPU184 terminates writing address confirmation processing (side Frame 707).

Then, CPU184 is based on rewriteeing the decision rewriting condition of threshold information 251 (box 708).Further specifically, such as Shown in above-mentioned example, terminate writing address confirmation processing after first or second table update processing at least performs once In the case of, CPU184 rewrites threshold value and BSWMB rewriting threshold values based on the WCB rewritten in threshold information 251 and determines as follows Rewriting condition (first to triple write conditions).

CPU184 first will be heavy more than WCB in the value of at least one party of 705 first and second updated WT_CTR of box It writes threshold value and is determined as the first rewriting condition.It is had updated in box 903 or 907 with+1 side of the second magnetic track (it is, the 3rd magnetic track - 1 side) magnetic track (the 4th magnetic track) associated BSWM tables 230 entry in+CTR (hereinafter referred to as the first+CTR) Or in the case of-CTR (hereinafter referred to as the first-CTR), the value of the first+CTR and the first-CTR is first by CPU184 More than value and the synthesis of the value of the first+CTR and the first-CTR is more than that BSWMB rewritings threshold value is determined as the second rewriting condition. In addition, have updated BSWM tables 230 associated with the magnetic track of -1 side of the second magnetic track (the 4th magnetic track) in box 1003 or 1007 Entry in-CTR (hereinafter referred to as the second-CTR) or+CTR (hereinafter referred to as the second+CTR) in the case of, CPU184 will The value of the second-CTR and the second+CTR is more than first value and the summation of the value of the second-CTR and the second+CTR Threshold value, which is rewritten, more than BSWMB is determined as triple write conditions.In the present embodiment, the first value is 1.But the first value also may be used To be the value bigger than 1.

Then CPU184 based on the respective values of first and second updated WT_CTR and WCB rewrites threshold value to judge the Whether one rewriting condition is true (box 709).In addition, in box 709, it is respective that CPU184 is based on the first+CTR and the first-CTR Value and BSWMB rewrite threshold value and judge whether the second rewriting condition true.Moreover, in box 709, CPU184 is based on second+ CTR and the respective values of the second-CTR and BSWMB rewrite threshold value to judge whether triple write conditions are true.Here, it is set to only Double write condition sets up (box 709 be).In this case, CPU184 will to by BSWM tables 230 with the first+CTR and The magnetic track (the 4th magnetic track=first magnetic track) that this pair of associated cylinder number of first-CTR and head number shown in this pair is write The data entered rewrite (box 710) using first 12 to the magnetic track.

Then CPU184 will be stored in WC tables 240 and the associated WT_CTR of the magnetic track with having rewritten is initialized as 0 (side Frame 711).CPU184 is by the first+CTR and the first-CTR (it is, being stored in BSWM tables 230 and the magnetic track to having rewritten is related + the CTR and-CTR of connection) it is initialized as 0 (box 712).Thus CPU184 terminates write-in processing.

In addition, in the case where triple write conditions are set up, also perform and similarly rewritten when being set up with the second rewriting condition. That is CPU184 will be to by BSWM tables 230, this pair of associated cylinder number and head are compiled with the second+CTR and the second-CTR The data of magnetic track write-in shown in number this pair, (box 710) is rewritten using first 12 to the magnetic track.

Then CPU184 will be stored in WC tables 240 and the associated WT_CTR of the magnetic track with having rewritten is initialized as 0 (side Frame 711).In addition, CPU184 by the second+CTR and the second-CTR (it is, being stored in BSWM tables 230 and the magnetic with having rewritten Associated+the CTR and-CTR in road) it is initialized as 0 (box 712).

According to the present embodiment, performing to the number as the magnetic track (the second magnetic track) specified by the write instruction from host According to (box 703) during write-in, CPU184 performs writing address confirmation processing (box 707).Thus CPU184 detections are influenced by ATI Big first or second write access pattern (box 801 to 803).More specifically, CPU184 is based on being stored in WCL tables The group of 220 the 2nd WCL, detection is positioned at the 3rd magnetic track of+2 sides of the second magnetic track or -2 sides (it is, being previously written number According to magnetic track).

CPU184 is according to the detection of first or second write access pattern (it is, meeting the 3rd of first or second condition The detection of magnetic track), perform the first table update processing (box 804) or the second table update processing (box 805).Thus CPU184 pairs With the magnetic track (the 4th magnetic track) between the second magnetic track and the 3rd magnetic track (it is, meeting the 3rd magnetic track of first or second condition) + CTR and-CTR in the entry of associated BSWM tables 230 be updated (box 903 and 907 or box 1003 and 1004).In this case, magnetic track (the 4th magnetic track) associated with updated+CTR and-CTR is influenced big be subject to ATI. It is, the value of updated+CTR and-CTR reflect to second and third magnetic track data write-in pattern (first writes visit Ask pattern), with the 4th magnetic track be subject to the intensity that is influenced of ATI it is fully corresponding.

Therefore, CPU184 rewrites threshold value based on the BSWMB that the small value of threshold value is rewritten than WCB, determine a need for more The associated magnetic track of+CTR and-CTR after new carries out rewriting data.More specifically ,+the CTR of CPU184 in the updated And the value of-CTR be it is more than 1 (the first value) and should+CTR and-CTR value summation be more than BSWMB rewrite threshold value situation Under (box 709 be), perform the rewriting data (box 710) to magnetic track associated with the+CTR and-CTR.

So according to the present embodiment, CPU184 rewrites threshold value based on the BSWMB that the small value of threshold value is rewritten than WCB, is closing Suitable opportunity will be influenced big magnetic track (it is, second and the due to the data write-in to second and third magnetic track be subject to ATI Magnetic track between three magnetic tracks) rewriting data enter the magnetic track (the 4th magnetic track=first magnetic track).Although moreover, be repeated to The data of second magnetic track write but do not perform under the situation of the data write-in of the 3rd magnetic track (the second write access pattern), are based on WCB is rewritten threshold value and the rewriting data of the 4th magnetic track (the 5th magnetic track) is performed with the longer startup cycle.Therefore, according to this implementation Mode, the data for each magnetic track being reliably prevented from disk 11 disappear, and can prevent the access performance of disc driver from dropping It is low.

At least one embodiment from the description above, can based on at least two magnetic track data write to this extremely The intensity for the influence that magnetic track between few 2 magnetic tracks is brought, the magnetic track between at least two magnetic track is rewritten with suitable opportunity Data.

Several embodiments of the invention is explained above, but these embodiments are only to illustrate, and are not intended to limit invention Scope.These new embodiments can be carried out in a manner that other are various, can in the range of invention main idea is not departed from To carry out various omissions, displacement, change.These embodiments and its deformation are contained in scope, the main idea of invention, and are contained in power In invention that sharp claim is recorded and the scope being equal with it.

Claims (14)

1. a kind of disc driver, including：

Disk has multiple magnetic tracks including the first magnetic track；

Head is configured to write data to the disk, and reads data from the disk；And

Controller is configured to write the data to the disk carried out from the head and control from the digital independent of the disk System,

The controller is configured to：

By the first counter associated with first magnetic track and the second counter, manage in the range of outside adjacent track The influence that the data write-in that magnetic track in the range of magnetic track and interior adjacent track carries out respectively brings first magnetic track, it is described outer Adjacent track scope is adjacent in the outside of first magnetic track, and at least one magnetic track, the interior adjacent track scope is in institute It is adjacent to state the inside of the first magnetic track, and at least one magnetic track, first counter and second counter represent respectively Magnetic track in the range of magnetic track and the interior adjacent track in the range of the outer adjacent track carries out the number of data write-in,

Based on first counter and the respective value of the second counter, read the data of first magnetic track and read this The data got are rewritten to first magnetic track,

By the 3rd counter associated with the multiple magnetic track difference, manage in the respective both sides of the multiple magnetic track point The data write-in not carried out with the magnetic track in the range of the multiple magnetic track each adjacent adjacent track is each to the multiple magnetic track From the influence brought, the 3rd counter represents to carry out the number of data write-in with the magnetic track in the range of the adjacent track Corresponding value,

Based on the value of the 3rd counter, by the data of the 5th magnetic track associated with the 3rd counter to the 5th magnetic track It rewrites,

First counter and the respective value of the second counter be more than the first value and first counter and The summation of the value of second counter be more than first rewrite threshold value in the case of, by the data of first magnetic track to this first Magnetic track is rewritten,

In the case where the value of the 3rd counter is more than that the second big rewriting threshold value of threshold value is rewritten than described first, by described in The data of 5th magnetic track are rewritten to the 5th magnetic track.

2. disc driver according to claim 1,

Further include memory,

The controller is also configured such as：

According to the data write-in to the disk, including the address information of the position of the magnetic track including representing to be written with the data Log information is stored in the memory,

According to write to the data of the second magnetic track and by the including the address information of the position including representing second magnetic track In the case that one log information has been stored in the memory, based on the memory whether be stored with including represent the 3rd magnetic The second log information including the address information in road, update and the 4th magnetic track between second magnetic track and the 3rd magnetic track Associated first counter and the second counter, the 3rd magnetic track be from second magnetic track outward or inside leave to The magnetic track of few 2 magnetic tracks.

3. disc driver according to claim 2,

The log information further includes the first mark and the second mark, and first mark represents the address into the log information The magnetic track whether the data write-in of the magnetic track shown in information has been reflected in the range of the outer adjacent track with the magnetic track is associated First counter, second mark represent whether the data write-in to the magnetic track has been reflected in the interior adjacent track with the magnetic track In the range of associated second counter of magnetic track, it is described first mark and it is described second mark represent respectively in the first state First counter and second counter have been reflected in, has represented not being reflected in first meter in the second condition respectively Number device and second counter,

The controller is also configured such as：It is stored in second log information in the memory and second log information First mark or described second when being labeled as second state, update associated with the 4th magnetic track described the One counter or second counter, and first mark in second log information or second mark are become More described first state.

4. disc driver according to claim 3, the controller is also configured such as：

First mark or the institute being stored in second log information in the memory and first log information When stating second labeled as second state, first counter associated with the 4th magnetic track or described second are updated Counter, and first mark in first log information or second mark are changed to the first state.

5. disc driver according to claim 2, the controller is also configured such as：

By at least one based on the first coefficient, the second coefficient and the 3rd coefficient to the data write-in to second magnetic track Number is weighted, and thus calculates first counter associated with the 4th magnetic track or second counter Update additive value used, first coefficient, the second coefficient and the 3rd coefficient correspond respectively to carry out to second magnetic track The environment temperature of the disc driver, second magnetic track when data write radial location on the disc and to described Second magnetic track carries out the number retried during data write-in,

The additive value calculated is added to first counter associated with the 4th magnetic track or second meter The value of number device.

6. disc driver according to claim 2, the controller is also configured such as：

Based on whether being stored with outer adjacent track scope or interior adjacent magnetic including representing second magnetic track in the memory The log information of the address information of the position of magnetic track in the range of road selects the first chip value or value smaller than first chip value by the Two chip value, first and second described chip value correspond respectively to write data in the magnetic track for making the head that should write positioned at data In the case of the permitted head position offset,

The head offset in the range of selected chip value in the case of, using the head to second magnetic Road writes data.

7. disc driver according to claim 1, the controller is also configured such as：

First counter and the respective value of the second counter be more than the first value and first counter and The summation of the value of second counter be more than first rewrite threshold value in the case of, by the data of first magnetic track to this first Magnetic track is rewritten.

8. a kind of method that rewriting data is controlled in disc driver, including：

By the first counter associated with the first magnetic track on disk and the second counter, manage in the range of outside adjacent track Magnetic track and interior adjacent track in the range of the influence that is brought to first magnetic track of data write-in that carries out respectively of magnetic track, it is described Disk has multiple magnetic tracks including first magnetic track, and the outer adjacent track scope is in the outside phase of first magnetic track Neighbour, and at least one magnetic track, the interior adjacent track scope is adjacent in the inside of first magnetic track, and has at least one Magnetic track, first counter and second counter represent magnetic track in the range of the outer adjacent track and described respectively Magnetic track in the range of interior adjacent track carries out the number of data write-in；And

Based on first counter and the respective value of the second counter, read the data of first magnetic track and read this The data got are rewritten to first magnetic track,

By the 3rd counter associated with the multiple magnetic track difference, manage in the respective both sides of the multiple magnetic track point The data write-in not carried out with the magnetic track in the range of the multiple magnetic track each adjacent adjacent track is each to the multiple magnetic track From the influence brought, the 3rd counter represents to carry out the number of data write-in with the magnetic track in the range of the adjacent track Corresponding value；And

Based on the value of the 3rd counter, by the data of the 5th magnetic track associated with the 3rd counter to the 5th magnetic track It rewrites,

First counter and the respective value of the second counter be more than the first value and first counter and The summation of the value of second counter be more than first rewrite threshold value in the case of, by the data of first magnetic track to this first Magnetic track is rewritten；And

In the case where the value of the 3rd counter is more than that the second big rewriting threshold value of threshold value is rewritten than described first, by described in The data of 5th magnetic track are rewritten to the 5th magnetic track.

9. it according to the method described in claim 8, further includes：

According to the data write-in to the disk, including the address information of the position of the magnetic track including representing to be written with the data Log information is stored in the memory of the disc driver；

According to write to the data of the second magnetic track and by the including the address information of the position including representing second magnetic track In the case that one log information has been stored in the memory, judge whether be stored with including representing the 3rd magnetic in the memory The second log information including the address information in road, the 3rd magnetic track be from second magnetic track outward or inside leave to The magnetic track of few 2 magnetic tracks；And

In the case where the memory storage has the second day will information, update and second magnetic track and the 3rd magnetic Associated first counter of the 4th magnetic track and the second counter between road.

10. according to the method described in claim 9,

The log information further includes the first mark and the second mark, and first mark represents the address into the log information The magnetic track whether the data write-in of the magnetic track shown in information has been reflected in the range of the outer adjacent track with the magnetic track is associated First counter, second mark represent whether the data write-in to the magnetic track has been reflected in the interior adjacent track with the magnetic track In the range of associated second counter of magnetic track, it is described first mark and it is described second mark represent respectively in the first state First counter and second counter have been reflected in, has represented not being reflected in first meter in the second condition respectively Number device and second counter,

The method further includes：

First mark or the institute being stored in second log information in the memory and second log information Second is stated labeled as in the case of second state, updates first counter associated with the 4th magnetic track or institute State the second counter；And

First mark in second log information or second mark are changed to the first state.

11. it according to the method described in claim 10, further includes：

First mark or the institute being stored in second log information in the memory and first log information Second is stated labeled as in the case of second state, updates first counter associated with the 4th magnetic track or institute State the second counter；And

First mark in first log information or second mark are changed to the first state.

12. it according to the method described in claim 9, further includes：

By at least one based on the first coefficient, the second coefficient and the 3rd coefficient to the data write-in to second magnetic track Number is weighted, and thus calculates first counter associated with the 4th magnetic track or second counter Update additive value used, first coefficient, the second coefficient and the 3rd coefficient correspond respectively to carry out to second magnetic track The environment temperature of the disc driver, second magnetic track when data write radial location on the disc and to described The number of write-in during the progress data write-in of the second magnetic track；And

The additive value calculated is added to first counter associated with the 4th magnetic track or second meter The value of number device.

13. it according to the method described in claim 9, further includes：

Based on whether being stored with outer adjacent track scope or interior adjacent magnetic including representing second magnetic track in the memory The log information of the address information of the position of magnetic track in the range of road selects the first chip value or value smaller than first chip value by the Two chip value, first and second described chip value correspond respectively to write head possessed by the disc driver is made to be located at data Magnetic track and in the case of writing data the permitted head position offset；And

The head offset in the range of selected chip value in the case of, using the head to second magnetic Road writes data.

14. it according to the method described in claim 8, further includes：

First counter and the respective value of the second counter be more than the first value and first counter and The summation of the value of second counter be more than first rewrite threshold value in the case of, by the data of first magnetic track to this first Magnetic track is rewritten.